The-main



(No Medal.)

P. L. VONHAUS 81: H. BECKER.

PARALLEL PLIBRS.

Patented Feb. 7, 1893.

%W e M UNrrnD STATES FRIEDRICH LORENZ VONIIAUS AND HEINRICH BECKER, OFFRANKFORT-ON- THE-MAIN, GERMANY, ASSIGNORS TO SPOHR do KRAMER, OF SAMEPLACE.

PARALLEL PLlERS.

SPECIFICATION forming part of Letters Patent No. 491,231, dated February7, 1893.

Application filed November 7,1892. Serial No. 451,262. (No model.)

To aZZ whom it may concern: one another by a cross joint that the graspBe it known that we, FRIEDRICH LORENZ of the jaws is equal to that ofthe legs. The VONHAUS and HEINRICH BECKER, subjects of amount ofleverage is thus altogether in the the German Emperor, and residentsofFrankhands of the maker since it can be made as fort-on-the-lllain,Germany, (assignors to the great as desired according to the purpose for5 5 firm of SPOHB d: KRAMER, in the said city of which the pinchers areintended. Herein lies Frankfort-on-the-Main,) have invented new a veryspecial advantage of the new form of and useful Improvements in ParallelPliers, pinchers since they can be constructed vas Nippers, andtheLike,of which the following wire pliers, as well as for gripping orseizing,

1c is a specification. while the old form of pinchers could only be 60This invention relates to an improvement used for wire since as hasalreadybeen menin pinchers, pliers, nippers and the like and tioned, theamount of leverage and therefore consists in making the two legs of suchtools the force which could be exercised by means in one piece with thejaws thereof, such jaws of the pinchers was confined within narrow beingkept parallelin everyposition by means limits. On the other hand the newpinchers 65 of a special crossjointapplied tothe legs. In can easilybemade so strong that they will all forms of parallel pinchers atpresontin even serve to cut fairly thick rods of iron or existence the parallelmotion of the jaws is other metal such as rivets, screws, Soc. Theeffected by the legs of the pinchers, by the new pinchers mayalso beused with the same method of making the legs of shaped metal advantageas shears for cutting sheet metal, 70 or of curved plate andsuper-posing the one for which purpose only a very simple alteranpon theother as in scissors, the specially tion in the form of the jaws isrequired. constructed jaws being then guided parallel Moreover, in thenew pinchers the objectionby rods or slots. This method of constructionable shifting of the parts of the jaws relative a5 has however severaldisadvantages. In the to each other is obviated, since the legs of the 75 first place the parallel motion is confined to pinohers, and also thejaws are firmly conthe jaws and the legs do not share in it. It nectedtogether and only move toward or follows also from the construction ofthe away from each other in the direction of the pinchers that theirgrasp is confined to very pressure exercised upon them.

0 narrow limits, since the legs of the pinchers In order to enable ourinvention to betully 80 must execute a movement of considerableexunderstood we will describe the same by refertent relatively to thegrasp of the jaws. ence to the accompanying-"drawings in which, For thesame reason moreover, the expendi- Figure 1 is a side view of a pair ofpliers ture of force required in using the pinchers constructedaccording to our invention and of the present form is relatively verymuch showing the pliers in the open position, Fig. 85- greater, forsince the legs have to open very 2 is a similar View showing the pliersin the widely the proportionate power of the lever closed position, and,Fig. 3 is asimilar view to entire other side of the fulcrum is much re-Fig. 2 but with the cross links removed. stricted. A furtherdisadvantage lies in the A, B are the two legs and O, C and D, D

fact that in pinchers of the present form the are cross joints connectedon both sides to the 0 jaws execute a forward movement as they legs A,B. Each of these cross joints conare being closed. This disadvantagemakes sists of two links 0 and O and D and D reitself especially felt inminute work, such as spectively. These links overlie each other at thatof makers of delicate machinery and about their middle point and arejointed to- 5 watchmakers, so that no little practice is regether by apin E in such a way that each of 9 5 quired in working with pinchers ofthe pres the cross joints forms two pairs of legs of out form. All theobj cctions above referred about equal. length. The ends of one of eachto are obviated by the present invention, in of these two pairs of legsare connected with which the two legs of the pinchers and their the jawsby the pins F on which they turn jaws consist of two parts so connectedwith with the two legs A, B of the pliers. The 10c ends of the otherpair of legs of the cross joints 0, C and D, D are guided by pins GWorking in slots H of the legs A, B of the pliers. When the pliers areopened or closed, the pins G move along the slots H of the legs A, 13 ofthe pliers.

In the method of construction now being 1.6--

combination with two jaws and legs each jaw and leg being in one piecewhich is situated entirely on one side of the instrument, of two pairsof crossed links one pair on each side of the legs, the links of eachpair being pivoted together at their intersection and being connectedeach at one end with the jaws by pins on which they turn and at theother end by pins which work in slots in the legs, substantially asherein set forth.

2. In parallel pinchers, and the like, the combination with legs A Beach made in one solid piece with one of the jaws, of cross links 0, Cand D, D applied on both sides of the legs and adapted to move parallelto each other, the ends of such links being connected to the legs A, Bof the pinchers on one side of the joint by pinsF on which they turn andon the other side by pins G which Work in slots H in the legs so thatthe cross links can both rotate and slide, substantially as hereinbeforedescribed.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

FRIEDRICH LORENZ VONIIAUS. HEINRICH BECKER.

Witnesses:

FRANZ HASSL XCHER, FRIEDRICH CORRELL.

